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3 years ago

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Are two atoms of the same element identical?

1 answer:

Lera25 [3.4K]3 years ago

5 0

Answer:

No

Explanation:

Are two atoms of the same element identical?

No they are not, for multiple reasons,

1) Heisenberg uncertainty principle: Electrons don't have a definite position, and direction of motion, at the same time. So we can only know of the two. Therefore the atoms are not identical in terms of the location or direction of motion at any fixed point in time.

2) Isotopes, while the number of protons in the nucleus determine the element, atoms of the same element can have different numbers of neutrons in their nuclei.

3) Electrons again, atoms can exist in energized states, therefore we may have a different number of electrons

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The _____ agent is the substance in a redox reaction that accepts electrons.

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B. oxidizing

In the reaction the oxidizing agent is reduced.

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What is the mass of a liquid with a density of 2.12 g/mL and a volume of<br> 53.0 mL ?

joja [24]

Answer:

<h3>The answer is 112.36 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of liquid = 53 mL

density = 2.12 g/mL

We have

mass = 2.12 × 53

We have the final answer as

<h3>112.36 g</h3>

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3 years ago

Which of these compounds would you expect

Veseljchak [2.6K]

ClBr, two nonmetals

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3 years ago

A substance conducts electricity because of free moving, charged particles.

Galina-37 [17]

Answer:

105Comprendes las leyes de la electricidadAprende másClasiﬁcación de los materialesUn medio o material que permite el movimiento de las cargas eléctricas (electrones) en respuesta a una fuerza eléctrica, se denomina conductor. Los materiales conductores son los que se pueden electrizar en toda su superﬁcie, debido a que los electrones se mueven libremente. Los metales por lo general son buenos conductores de la electricidad.El ﬂujo de las partículas cargadas es lo que se conoce como corriente eléctrica. Las partículas cargadas en una cierta dirección de un conductor chocan con los átomos, produciendo una pérdida de energía que se maniﬁesta en forma de calor.Una medida de oposición que presentan las partículas cargadas al moverse libre-mente en una cierta dirección de un material conductor es lo que se conoce como resistencia eléctrica.Los materiales que no permiten que las partículas cargadas se muevan hacia otra región del material a una fuerza eléctrica, son llamados aislantespor ejemplo, la madera.Existen otros tipos de materiales cuyas propiedades son intermedias entre los conductores y aislantes; se llaman semiconductores.Algunos ejemplos de materiales con estas características son:

Explanation:

6 0

3 years ago

How many grams of magnesium oxide are formed if 20.9 grams of Mg and 15.2 g of O2 react.

anyanavicka [17]

Answer:

Mass of magnesium oxide formed = 35.1 g

Explanation:

Given data:

Mass of Mg = 20.9 g

Mass of O₂ = 15.2 g

Mass of magnesium oxide formed = ?

Solution:

Chemical equation:

2Mg + O₂ → 2MgO

Number of moles of Mg:

Number of moles = mass/molar mass

Number of moles = 20.9 g/ 24 g/mol

Number of moles = 0.87 mol

Number of moles of O₂:

Number of moles = mass/molar mass

Number of moles = 15.2 g/ 32 g/mol

Number of moles = 0.475 mol

Now we will compare the moles of MgO with magnesium and oxygen.

Mg : MgO

2 : 2

0.87 : 0.87

O₂ : MgO

1 : 2

0.475 : 2/1×0.475 = 0.95

Number of moles of MgO formed by Mg are less thus Mg will limiting reactant.

Mass of MgO:

Mass = number of moles × molar mass

Mass = 0.87 mol × 40.3 g/mol

Mass = 35.1 g

6 0

3 years ago